+106 An infinite geometric series has common ratio \(-\frac{1}{5}\) and sum \(16\) What is the first term of the series?
Its 96/5. The formula for sum of an infinite geometric series is A1/1-r Where A1 is the first term in the series and r is the common ratio. Plugging in your values, you have A1/1-(-1/5)=16------------> A1/(6/5)=16 Solving for A1 you get 96/5. No clue where my guy got 64/5 from.
